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session.Session.with_window

with_window ( self , options : impl Into<NewWindowOptions> , operation : impl AsyncFnOnce(&Window) -> Result<T, E> ) → Result<T, E> method [source] ¶ method [source] ¶ with_window: Create a window, run an operation with it, then kill it.

Once this future is polled, the scope owns creation and cleanup. Cancellation or unwinding can let an in-flight creation finish, but a window whose creation yields a handle is killed while the Tokio runtime remains active. Ordinary handle Drop remains non-destructive.
Setup and teardown failures convert into the operation's own error type, so a caller writes one ? rather than unwrapping twice. When both the operation and cleanup fail, the cleanup error is returned as Error::AfterEffect , because tmux had already accepted the scope's creation; the operation error is discarded. When the operation fails and cleanup succeeds, its generic error is returned unchanged: the scope cannot certify replay safety for arbitrary callback work. A canceled caller cannot receive a cleanup error, so tracing is its only report.
Errors
Returns the operation's error, or a converted [Error] when the window could not be created or could not be killed after creation.

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